论文标题
冠状孔对CME挠度的影响：数值研究
Influence of coronal holes on CME deflections: numerical study
论文作者
论文摘要
对产生冠状质量驱散偏转（CME）偏转的原因的理解对于太空天气预测至关重要。在本文中，我们研究了靠近弹出区域的冠状孔的不同特性产生的CMES轨迹的影响。为了进行此分析，我们对理想的磁流体动力学方程进行了数值模拟，这些方程模拟了在存在冠状孔的情况下CME的早期上升。我们发现，磁场越强，冠状孔面积越宽，CME挠度就越大。当冠状孔远离射血区域时，这种效果会降低。为了表征这种行为，我们提出了一个取决于冠状孔特性并正确量化偏转的无量纲参数。另外，我们表明，CME磁性结构附近的冠状孔的存在会产生最小磁能区域，该区域负责偏转。因此，我们发现冠状孔特性，该区域的位置与CME偏转之间的关系。
The understanding of the causes that produce the deflection of coronal mass ejections (CMEs) is essential for the space weather forecast. In this article, we study the effects on CMEs trajectories produced by the different properties of a coronal hole close to the ejection area. For this analysis, we perform numerical simulations of the ideal magnetohydrodynamics equations that emulate the early rising of the CME in presence of a coronal hole. We find that, the stronger the magnetic field and the wider the coronal hole area, the larger the CME deflection. This effect is reduced when the coronal hole moves away from the ejection region. To characterize this behavior, we propose a dimensionless parameter that depends on the coronal hole properties and properly quantifies the deflection. Also, we show that the presence of the coronal hole near a CME magnetic structure produces a minimum magnetic energy region which is responsible for the deflection. Thus, we find a relationship between the coronal hole properties, the location of this region and the CME deflection.
